Dump car



May 21, 1940. A. c. SCHVMOHL DUMP CAR Filed Sept. 28, 1938 Sheets-Sheet 1 INVENTOR. ay/e0 ['Jfiima/ May 21, 1940. A. c. SCHMOHL 2,201,945

DUMP CAR Filed Sept. '2 1938 2 sheets-ghee: 2

IN V EN TOR.

Patented May 21, 1940 w en STATES PATENT OFFEQE DUMP UAR Application September 28, 1938, Serial No. 232,130

2 Claims.

The present invention pertains generally to dump cars of small capacity which are manually tilted and righted. The invention pertains specifically to an improved body tilting bearing and an improved locking device for the body.

Cars of this type are used for various industrial purposes and are usually manually propelled as well as manually operated. Such cars are frequently built with capacities of 40 cu. ft. and more. The usual practice is to hinge one end wall of the body so that the lading can be readily discharged when the body is tilted.

Because of the relatively large capacities and the manual means employed to tilt the car body, it becomes necessary to provide a body bearing which not only supports the'car in stable equilibrium during movement of the car but one which can be easily moved by the operator from a position of stable equilibrium to tilted position.

These cars are often used in operations where it is advantageous to discharge the lading at times over the end of the underframe and at other times over the side of the underframe. The use of a hinged wall as a door for these cars makes as necessary locking means which not only retain the body in position during movement of the car but will retain the door in closed position until the operator is ready to discharge the lading.

An object of the present invention is to provide a body bearing which supports the body in normal position and is easily moved to bring the body into tilted position.

Another object of the invention is to combine such bearing with means for bringing the body into position for selective discharge of lading over the end or side of the car underframe.

A further object of the invention is to provide a body anddoor lock to control the door during movements of the car or body until such time as the operator desires to release the lading.

In the drawings forming part of this specification, Fig. 1 shows in side elevation a car equipped with the invention; Fig. 2 shows an end elevation of the car; Fig. 3 shows in plan the body supporting bearing and turntable; Fig. 4 shows an end elevation of said bearing and turntable; and Figs. 5 and 6 show the various positions of the bearing as the body moves from normal to tilted position; Fig. 7 shows a section through the bearing on lines 1-! of Fig. 3; Fig. 8 shows an enlarged view of the various positions of the loor look when the locking means is securing the body and door in position, when the door is held locked and the body released and when the door is released.

Referring now in detail to the drawings wherein like reference characters refer to like parts, reference character I indicates a conventional underframe including spaced sills supported on Wheeled axles 2 and a body 3 tiltably supported on said underframe. One end Wall of the body is constituted as a gate 4 having a top hinge connection to the body at the side walls 5 thereof.

The body 3 being supported upon the underframe for both rotary and tilting movement, rotary movement is provided by a turntable comprising a base 6 having apertures l therein for reception of suitable fastening members to secure the base to the underframe. A circular track 8 is provided on said base for reception of rotatable supporting members, such as balls 9 and a cover plate such as it is supported by said balls. The base 6 has an upwardly extending hollow central portion ll engaging within an aperture E2 of the cover plate to position the cover plate and suitablemeans may be inserted through portion H to secure together the turntable base and cover.

To support the body upon said turntable and provide tilting movement, lugs [3 are disposed upon opposite sides of the turntable cover Ill and provided with oppositely disposed portions M adjacent the base thereof. Secured beneath the body are suitable body bearings comprising webs l5 disposed adjacent each lug [3, said webs having a top flange It for attachment to the car body and a bottom flange ll engaging the portion It of the turntable cover l0. Flange i1 is preferably extended upwardly at the sides of Web E5 to reinforce the said Web. The flange ll at the base of web [5 has a fiat central portion to provide support for the body in stable equilibrium and a curved end portion to provide a rocker upon which the body rolls during initial dumping movement. Each web I5 has an aperture 3 therein disposed above and outwardly of the flat portion of flange ll, as shown in Fig. 5 of the drawings. Each lug i 3 has an aperture I9 registeri ng with aperture [8 and elongated downwardly therefrom and away from said flat portion of lug H. The relation of the elongated aperture 19 and the flat portion of flange I1 is such that as the body bearing rolls on the curved portion of flange ll, the aperture in web I5 moves into register with the lower end of aperture l9.

Inserted through the registering apertures I8 and u 19 are bearing pins 20 provided .with suitable means such as cotter pins to retain the bearing pins in position.

Upon reference to Figs. 1 and 5 of the drawings it will beobserved that the body supporting bearings are disposed beneath the body 3 to bring the flat portion of flange l! of the bearing beneath the center of gravity of the body as indicated by lines X-X. Preferably the major portion of the weight of both loaded and empty body is so disposed that the body will normally tend to be unbalanced and tip toward the rigid end of the car. To maintain the equilibrium of the car an upwardly extending portion 2! is provided upon the turntable cover I!) between the body bearings and for engagement with the underside of the car body when in normal position.

Because of this normally unbalanced mounting of the car body, and particularly in the larger capacity cars, considerable strain could be imposed upon the turntable cover plate lug 2i. To relieve this I prefer to place additional supports such as 23 beneath the rigid end of the body as shown in Figs. 1 and 2 of the drawings.

A locking device for the body end wall door 6 comprises a shaft 35 disposed beneath the floor of body 3 and journaled in end plate 24 and brackets 28 and 28 One end of shaft 35 has an arm 36 adapted to overlie the door t and engage bearing plate 29 thereon. The other end of shaft 35 extends through end plate 24 to receive an operating handle secured in position by nut 26. Handle 25 has depending portion 2'! terminating in a curved tip for engagement with pin 34 mounted in body support 23. At each side of the rigid end of the body are handholds 32 and handle 25 moves between same. A locking link 33 is mounted on one handheld 32 for engagement with handle 25. A suitably shaped bar 35 retains handle 25 in its various positions between handholds 32.

Three positions of locking lever 25 are shown in Fig. 2 of the drawings and correspond to the three positions of arm 30 illustrated in Fig. 8 of the drawings With the lever 25 in position shown by full lines on Fig. 2, the arm 3E! is shown by full lines in Fig. 8, the body 3 and door 4 are both locked in position as shown by full lines on Fig. 1. Upon movement of lever 25 of Fig. 2 to the right into intermediate position indicated by reference character 25 the body is released for rotary movement upon the turntable but the door 4 is still held in locked position by arm 36 which has moved to position 38 After lever 25 is released from position .25 and moved to position 25 arm. 30 is correspondingly moved to position 30 and door 4 is released for opening.

Referring again to Figs. 1, 2, 5 and 6 of the drawings, the body in Fig. 1 is locked in position for transportation of lading after reaching the dumping point if end dumping is to be effected, the lever 25 is moved to either position as shown by reference character 25 or 25 and the operator tilts the car body. During its initial tilting movement the body and associated bearing rocks on web I? and portion M of the turntable during which the bearing moves from position shown in Fig. 5 to that shown by full lines on Fig. 6 and pin 29 engages the lower portion of slot IQ of lug I 3. Thereafter the bearing pivots on pin 20 in slot 19 of lug l3 until the body reaches fully dumped position where it rests on bearing plate 3| of the underframe. In this latter position of the body, lever 25 can then be moved to position 25 if not already in this position, and door 4 will open to release the lading.

In cases where it is desired to discharge lading to the sides of the car, lever 25 is again moved into the position indicated as 25 and the body is rotated to bring door 4 to the desired position at the side of the underframe I. It will be observed upon reference to Fig. 2 of the drawings that the body can be rotated 90 or 270 to bring door 4 to either side of the underframe and with lever 25 in the position indicated by 25 the door 4 is retained in locked position during this movement. Before rotation of the body, the operator may find it necessary to rock the car slightly on bearing l5 and turntable portion 14 to free the body from support 23 so as to prevent interference therewith. Thereafter upon the body reaching the desired position and lever 25 being moved to position 25 the lading will be discharged.

After discharge of the lading the body may be easily returned to normal position and locked again for reloading since during the initial return movement of the body it is pivoted upon pin 20 until web ll of the bearing l5 again engages the turntable at M- From the foregoing description it becomes apparent that the car rocks on its bearings during initial dumping, thereby requiring little effort and after acquiring momentum is pivoted upon pin 20. Thus, considerable less eifort is required to dump the body than would be used were the body moved solely about a fixed pivot and there is less longitudinal movement of the body relative to the underframe than where the body rocks upon the turntable for the entire dumping movement. Also, by use of the pivot a steeper dumping angle of the body is obtainable with a body disposed closer to the track than in designs using a rocker bearing for the entire movement, thereby resulting in a more stable car.

Having thus described the invention what I claim as new and desire to secure by Letters Patent is:

1. A combination turntable and bearing support for a dump vehicle comprising a turntable base, a turntable cover supported on said base, upwardly extending bearing lugs spaced adjacent opposite sides of said turntable cover, an elongated aperture in each of said lugs above said cover each aperture being inclined downwardly and outwardly toward the base of said lug, a vehicle body supporting bearing disposed adjacent each said bearing lug, each said body supporting bearing having a suitably shaped top portion for engaging the vehicle body and a bottom portion engaging the turntable cover, each said bottom portion curving upwardly at its juncture with one body supporting bearing side wall to form a rocker shaped surface upon which the body turns in initial dumping movement, an aperture in each said body bearing portion, a bearing pin substantially filling each said aperture and normally registering with the inclined lug aperture in spaced relation to the bottom thereof, said bearing pin registering with the bottom of said inclined lug aperture after the body supporting bearing rotates on its rocker shaped portion and providing a pivotal support for the body supporting bearing on the bearing lug.

2. In a dump vehicle of the character described, in combination, an underframe, a turntable having a base secured in rigid relation to the underframe and provided with a rotatable top cover, bearing lugs secured to said top cover and extending upwardly therefrom, a body supporting bearing having an upper portion connected to the body and a bottom portion supported on said turntable cover adjacent each said bearing lug, each said body supporting bearing Ill) bearings providing the sole support for the body during the initial dumping movement thereof and the said bearing pins thereafter registering with the bottoms of the lug apertures providing the sole support for the body during the remaining dumping movements of the body whereby the tilting support for the body is first a rolling contact of said rocker shaped bearing surfaces on the turntable cover and thereafter a pivotal suption to the turntable cover.

ALFRED C. SCHMOHL.

, port on said bearing pins in vertical spaced relain 

